Scroll-sawing machine



(No Model.)

A. S. DAVIS.

SCROLL SAWING MACHINE.

No. 310,563; Patented Jan. 13, 1885.

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ADELBEH'I DAVIS, OF SENECA. FALLS, NE\V YORK.

SCROLL-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 310,563, dated January13, 1885.

A pplicaiion filed October "20, lrX-"l.

To (0 whom it may concern.-

Be it known that I, ADELBERT luvls, of Seneca Falls, in the count-y ofSeneca, in the State of New York, have invented new and usefulImprovements in Scroll -Sawing Machines, of which the following, takenin connection with the accompanying drawings, is a full, clear, andexact description.

This invention consists in an improved construction of the main support01' the vibratory saw-frame, which support admits of ad justing thesaw-frame arms in their position, so as to sustain them in aperpendicular line one over the other, and also admits of adj usting thepivotal bearings of the saw-frame 011 its said support to compensate forthe wear of said bearings and take up the lost motion incident to saidwear.

In the annexed drawings, Figure l is a side elevation of a scroll-sawingmachine provided with my improvement. Fig. 2 is a horizontal section 011line cc min Fig. 1, on an enlarged scale. Fig. 3 is an enlarged sideelevation of that portion of the machine to which my im provement isapplied. Fig. 4 is a vertical transverse section on line y y, Fig. 1,also on an enlarged scale; and Figs 5 and 6 illustrate modifications ofmy invention.

Similar letters of reference indicate corresponding parts.

A represents the standard or main support-- ing-frame of the machine,the peculiar construction of which frame constitutes the subj ectmatterof another application for Letters Patent which I intend to make.

B is the driving-wheel j ournaled on the rear portion of the frame androtated by the treadles T T, pivoted on the bottom portion of the frame,and pitmen O C, connected with the treadles and with wrist-pins on thedriving-wheel.

D denotes a counter-pulley journaled on the front portion of the frameA, and having connected with it the balance-wheel E. The upper portionof the frame A terminates with forwardly and rearwardly extended arms,on the first of which is mounted the table G in any suitable andwell-known manner.

On the rearwardlyextended arm of the frame A is rigidly secured the mainsupport of the saw-frame F F, which usually consists of two tough andslightly elastic wooden arms, arranged in a perpendicular line one overthe (No model.)

other, and reaching, res 'iectively, overand uuder the table G, wherethey carry the jig-saw H, which passes through a slot in the table andis connected at opposite ends to the re spective saw-frame arms F F bythe ordinary and well-kn own means, not requiring a'detailed descriptionin this case. The lower arm F being connected with a crank-pin on thepulley D by a pitman, I, and said pulley being rotated by thedriving-belt a around the drivingwheel B and pulley D, imparts thevibratory motion to the saw-frame and the reciprocating motion to thesaw. The main support of the saw-frame is in the form of apost, p, whichis here shown rigidly attached to the frame A; but I do not limit myselfto such arrangement, inasmuch as the tableG may be provided with arearward extension of sufficient length to have the post 1) attachedthereto. The ends of said post I form with bifurcations or lateralextensions terminating with ears 0 0.

To each of the saw-frame arms I attach a plate, in, provided with ahorizontal bar, Z), which is either adapted to be embraced between theears 0 0 of the post, as shown in Fig. el of the drawings, or made toreach over said ears and terminate with ears 00, embrac ing between themthe ears 0 0 of the post, as represented in Fig. 5 of the drawings. Ineither case the plate on is pivoted on the post by set-screwsn n,passing through corresponding screw-threaded eyes in the outer ears, andhaving pointed ends entering recesses or sockets in the ends of theportion embraced between the aforesaid outer ears. Said set-screwsconstitute pivots, which admit of a ready attachment and detachment ofthe saw-frame when desired, and are adjustable endwise, and thus admitof adjusting the saw-frame arms F F, so as to carry them in aperpendicular line one over the other, and also admit of taking up thewear of the pivotal bearings. If

desired to use only one of the set-screws a as aforesaid, one end of thebar I) of the plate on can be made conical and seated in a suitablesocket or recess in the adjacent ear 0 of the post, as illustrated inFig. (i of the drawings.

In order to render the saw-frame arms F F adjustable, to maintain themparallel with each other, I provide the plates in on with transverseslots 1 1., through which to insert screws 2 2, by which the said platesare attached to the ICO arms F F. By loosening said screws the arms canbe turned on the plates at m, so as to set the two arms F F parallelwith each other, and by properly tightening the screws the said arms areretained in their parallel position.

Z represents the usual straining-rod extending through the two saw-framearms F F back of the post p, and provided at one or both ends with a nutor nuts, 0, by which to exert the requisite pressure on the rear ends ofthe arms F F, to cause the forward ends thereof to hold the saw H at thedesired tension.

Inasmuch as the arms F F are maintained in parallelism during theirvibratory movement, the rod Z receives an oscillatory movement, and inorder to obviate binding or friction of the connection of the rod Zwiththe arms F F, I interposc between the nut c and arm F two washers, r andd, fitted to each other with V-shaped or so-called scale-bearings, asshown in Fig. l of the drawings.

Having now fully described my invention, what I claim as new, and desireto secure by Letters'Patent of the United States, is-

1. In combination with the main frame A and saw-frame F F, thepost P,rigidly attached to the frame A, plates attached to the sawframe, andconnected with the post by bifurcations on either the plates or post,said bifurcations embracing the other of said parts, and pivots passingthrough the bifurcations and engaging opposite sides of the embracedpart and arranged adj ustably endwise to take up the wear of thepivotsand adjust the frame F in its position, substantially as specified andshown.

2. The combination, with the saw-frame and its supporting-post p, theplates m m, pivoted on the post and provided with slots 1 1, andattaching-screws 2 2, passing through said slots, substantially asdescribed and shown.

In testimony whereof I have hereunto signed my name and affixed my seal,in the presence of two attesting witnesses, at Syracuse, in the countyofOnondaga, in the State of New York, this 3d day of October, 1884.

ADELBER'I s. DAVIS,

